Determining the effective coefficient of kinetic friction
A 260 kg piano slides 4.5 m down a 30° incline and is kept from accelerating by a man who is pushing back on it parallel to the incline. The effective coefficient of kinetic friction is 0.40.
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Over the past century, tornado deaths in the U.S. have been declining significantly. Have the number of observed tornadoes gone down as well? Is there any relationship between these two variables?
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Just as a car tops a 37 meter high hill with a speed of 79 km/h it runs out of gas and coasts from there, without friction or drag. How high, to the nearest meter, will the car coast up the next hill?
A charge of +1.62 × 10^-9 C is placed at the origin, and another charge of +6.27 × 10^-9 C is placed at x = 2.4 m. The value of the Coulomb constant is 8.98755 × 10^9 N · m2/C2.
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An electric field is set up between two parallel plates, each of area 2.0 m2, by putting 1.0 C charge on one plate and a -1.0 C charge on the other.The plates are separated by 4.0 mm. What is the magnitude of the electric field between the plates
A ball is thrown horizontally from the roof of a building 59 m tall and lands 35 m from the base. What was the ball's initial speed?
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